Mold



Nov. 8, 1927. 1,648,194

, H.D. RINDSBERG MOLD Filed April 2. 1926 5 sheets-sheet 1 Nov. 8, 1927.`l

H. D. RINDSBERG MOLD Filed .April 2, 1926 5 Sheets-Sheet -2 H. D. RINDSBiI-:RG

MOLD

Filed April 2. 1926 5 Sheets-Sheet 5 l Gramm;

Nov. 8, 1927. A

" H. D. RINDSBERG MOLD Filed April 2, 1926 5 Sheets-She# 4 Nov. s, 1927. 1,648,194

H. D. RINDSBERG MOLD ' Filed April 2. 192s 5 sheets-sheet 5 Jpeg] gwwnkw Patented Nov. s, 1927.

f UNITED STATES PATENT oFF-ic.

HARRY DAVID RINDSBERG, or CINCINNATI, oHIo, AssIGNoIt To HARRY J. HAIER, oF4

' Y CINCINNATI, oHIo. f f Y MOLD.

Application ined April a, 192e. serial No. 99,407'.l

My'invention relates to improvements in permanent metal molds ofthe kind used in making castings from metals and metallic alloys such as aluminum and itsalloys which have comparatively low fusing points, although not necessarily restricted tofthis type of mold. vvMore particularly the invention relates to molds of this type for producing hollow or cup shaped cylindrical castings such as skirted pistons for internal combustion engines, although capable of other' uses.

lSpecifically thepresent invention relates to certain improvements in the molding de-` vice shown and described in the, patents to Owen et al., No. 1,538,584 of May 19, 1925, 4and Schnobrich No. 1,525,898 of F ebruary 10,1925.V l

rlhe invention relating to the core drawing apparatus and core supporting rack is claimed lin divisional application No. 219,- 520, filed September14, 1927, f

, An important object of my invention is to provide a mold of the above mentioned character'l which is capable of operation by a single workman. Y, v

Another object of my invention is lthe provision, in a device of this character, of means whereby the mold sections may be cleaned and repaired without being separated from the restof the mold.

A further object of my invention isrto provide a device of this character which is removably mounted on a support, the sup- Y port being capable of; use with different molds. 'y

Still another object of my invention 'is to provide improved `means for removing the center core section.

f A still further object of my invention is to provide an adjustable core supporting rack to vaccommodate different Workmen.

Other objects and advantages of my invention will be apparent during the course of the following description. i

.lnthe accompayingl drawings, wherein like characters of reference denote like or corresponding parts throughout the same Figure 1 is a side elevation ofl my improved molding machine,

Figure 2 isa top plan view thereof,

Figure 3 is a central longitudinal sectional viewy thereof, V- Y F igurej4 is a side elevation of the same,

showing the separated position ofthe mold sections, Figure 5 is an end Figure 6 is. a central transverse sectional view thereof,

Figure 7 is a detail perspective viewv of one of the' mold sections illustrating the l Figure l0 is a detail perspective view of the mold support, andvcore rack portions of the core rack being broken away. 'f o I have selected for purposes of illustration, `.a"one man mold7 ofthe type shown in the above mentioned patents, although the present invention is by no means limited to a mold of this special type.

In the drawings,whereinfor the purposeV Y i ment 'of my invention, the numeral, ldesig# nates a suitable base plate on Vwhich a pair mounted as is usual.v The .meetingffaces of y of illustration is shown a` preferred embodi of separable mold sections f2 kand 'are 'Y these sections are so'sha'ped as to form a mold cavity 4, which in thecase of a piston mold, is of course circular in plan.

A gate vor inlet leading to the mold caveA ity 4, is also formed in theV meeting'lfaces of the two mold sections as indicated at 1 5 in Figure, and l`so far asfthe present invention is concerned, this gatemay be of any desired construction.` o Y.

Thedra-wings show seven cooperating core members, fitting within the upper, part of themold cavity, although the invention may be used'where other numbers of'corefmembers are utilized as for instance, three kor five. These core members are clearly shown,V

-in Figure 2 and compriseY acentral mem'- ber 7 flankedfby a pair of: associatedmembers 10, 11, 12, and v13 ttingin pairs at each side of the central group. The construction, and manipulation of-these core members is too well known in the artto require detailed,descriptionhereQ Y The three middle members '6,l 7, and 8 are'provided with upstanding .rods or han'- 55'2 Aelevation of the moldking machine, vvj

65 Figure 9 is a detail view of the core bal- I ing bent around "through'substantially 1805i.;

. spectively. n Y -i Y i Y Infor-der -toprop'erlyposition the"- corel .Vmeinbers 1Q andll, andk 12 and 13, lpref 'lerably provide pins22 andy 28Vv set int-o the 4dles 9 by which they may be manipulated,

and an arm having a handle iat its end is also rigidly secured to each ot' vthe iour ycore members 10,115 12,*and 13a such arins'ex-V tending in the same general direction and being substantially horizontal. Y o i The arms lre'desigfnated by the'charzuztersv 14, 15, 18, and 19, the arms 14 Vand lbedegreesl and the four handles carried by the arms are designated .'16,- 2O,` and/'21 rc- I 'mold sections 2'a`nd 3respectivelyadjacent Y thefmeeting 'edges ofthe core'ineinbersqas `YVclearly' shown inFigure 3.

f i Set Vinto oppositey sides 'of the mold sec- 24, these studs preferably having'reduced tions 2 and Siaretwopairs of pinslorjstuds threaded endsi24a. 2which' are screwedfinto suitable yopenings in lthe mold sectionsl lThe V.studs Vvforming each pair are parallel and spaced slightlyfapart, Vand their outer ends are 'reduced' and: threaded, as shown' at25.

` plate orbracket 26, having a slot 27,"tl'1erei in, fits .overjtheends 25 of each pair'oi studs 24 Land is; secured 'in `positionthereon' vby *means of-jnuts25a. -By'virtue ofv the slot i 27V, the plates26mayv befadjusted slightly if zV The'iower ends perte pretreatment-S1 `v"V26are "forked, Vas'fshown at 28 and tlrese over racks Y29V circular inV cross section l and .f'provided withv teethonftheir upper sides. l TotheV inner?A .end of 4each vrack is. secured a corel meinberjSO, suchy -meinber forming',n in effect,V a continuation ofthe rack `body and Y *being-'j in alignment'ftherewithff These core membersy SOslide` freely v through 'the' Side' [walls of thev mold "sections l2and 3,"and the outer-V ends` o'f'th'e "-racksf 29. 'are slidably mounted i'n'gbraclets i3427 adj ustably v secured tothe ends" of ther'baseplate. Eacho thesefbmciersfis pmviaea-'Wahai" pair or.

which `Vworkr` 7 38- v"as Y interposed tV 'meerKV thtre or @een filter VV29V and the 'adj acent wall of themold Section and` surrounding and rigidly? secured to L the core member-30 is a collar 31'.- This collar i is ots-uch size that it cannot pass through VVthe'forlredendfof the bracket 26; vbut vwill enggegwth the prongs 28 "thereof,4 for# 'a Ypurpose hereinafter described.

A rl--va pinionY 37,-IsecuredV to --a Ashaft 38,A jour? weo- @ne of the-racks 29 in engagement-with naled in lextensions 3240i the bracket- 32, and Vextending a* considerable vk'iistaiice beyond said bracket as indicatedrat V38a'in Figure 2, this extended `portion preferably be- -.ingenlarged.` At vthe extreme end, this en la-1``gedp`ortio1r38a ofthe shaft 38 Vcarries an operating lever 39 having anarin 40 pivotally connected at 41 with a link 42. The

@liegender thisiiiikisfaseirpivotniy connected at 43 with ay crank arm"y 44,v securedrk to a-shaft' 45, journaled in extensions 32a or' the'k other bracket 32 at .the otherV side o f the mold, Vand having rigidly mounted v thereon a pinion 46 which engagesV KVwith thek other rack 39. Y. Y I U ,The bottom of the mold cavity is formed Vby-ffmeans of;` a pair of 2" andS respectively, as@` screwsf. VThese plates "cooperate with'the mold sections proper to ycompletely enclosethe moldcavity,

entirelyV independent of the vbase of themal chine. i Spaced runways Vor rails 47v are provided upon "which fthe'V mold sections'y f are .slidably mounted. Byreferenceto Figure 6 it` willbe seen thatv these rails@ are disposed y plates 34 land 85 se'- cured to the lower ends of themold sections o'negat each sidef'of the rame'and .are `sofV Y f flanges, as shown in Figure ,6if f From the foregoing it will be (obvious: that 4Vwhen the lever 39 is swung ,upwardly from positioned" relative to the ,plates 34 and 35V '-Y 1- 'y the position shown inFigure 3, ythetwopin''V ions 37 andff46i'will be simultaneously rog-" tated, and will causeithe racks 29 to travel simultaneously in opposite directions. VThe first part o1- this movement l'resultslin with# drawingl the ',core. members -30 from'` 'the cavity ot' the mold. After thisinitial vmovement*7 a'vi'urther movement inthe sameifdi-V rection causes "the colla'rsflV to "engage the lower *forkedfends'of the brackets 36,' and thus; as the movement ofthe racks continues, v

Vthesebrackets;'together with'the'lmold sections 2fand3'- to which theyare'attachedyfare n simultaneouslyvmoved away from' eachother oriniopposite directions; such sections slid-j' i ing uponfthe runways as'they,aremovediI In order to lock,the'inoldjsections tightlyk g together during the castingoperatiomasjhas v already been proposed, apair of latches -ior khooks 49,,mountedY one. at feach side o'the mold;v are provided `and are adapted :toengefpinsv 50', 'set interpone; or the mold i sections,`- andi' are isoformed that A'the Vvpoint lor beakA or the:hoolrfunderlies the pini when inlocledposition;Z In order therefore' to die# engage the hoolrsl from lthefpins itis neces:

hooks are 'swung' upwardly"ontheir pivots Y' In order to accomplish this, ea-ch" hool is gournaled upon an eccentric 51,'these ecceir 'tricsbelng rigidly secured Vtoa shaft 52 journaled in thev mold section The ends of the shaft 52 are .extended beyondy the eccentrics and-carry transversely/disposed radially prosaryf'to first movetheni :longitudinally s oj Vthatthe beakwillclear the :pinsfffwhen the4 jecting pins 56. These pinsare adapted to engage pins carried by the hooks 49, so as to elevate the hooks into release positionr as the shaft' 52 is rotated. In order to rotate ythisfshat't, I secure to one end thereof a crank arm'53 provided at its end with a l handle 54.

In order to facilitate thework of the single operator of this machine of the one man type, and to avoid possible damage to the core -members,`I provide a special 'holder to receive these core members when they are removed from the mold cavity. This'holder comprises a pair oi' upstandmg arms or-side i members 57 secure-d to a mold support hereinafter described; To the upper ends oi' the side members 57, a pair oi inclined pans or Vtrays-58 and 59 are adjustably securedby meansl ort integral brackets or lugs 58a and 592*` heldin place by bolts 59b'which tit in openings 59, .there .beinga s'uiiicient number Y 57 being adjustably secured thereto by means of pivot bolts 62 arranged at the lower ends ot the: segment plates and adjusting bolts 63' extending through arcuate slots 64in the' plates 61. It will be seen that not only ymay the trays be adjusted for diii'erent workmen, but 'the supporting arms 57 are capable ot a large range o'li adjustment by moving the adjusting bolts 63 in the slots 64. In this way diii'eient sizesv of Workmen may be read Y ily accommodated.

Arranged at the upper end of one of the arms 57 is a swivel connectioncomprising a body portion 65 bolted to theiarnr 57 and having a vertical bore in itsupper end for 1 the reception of a swivel pin 66-carried by avit'orked-swivel 167 The crotch vof the fork is substantially inverted V-sliape in cross'- sectionras shown at 68 in Figure 9.

A balance Varm 69 is pivotally connected' between the arms of the fork at 70 and rests upon the apex of tlieV at 68. It will be seen that the balance arm is capable of swiveling about an angle of 36() degrees and is also capable of pivoting about the connection 70 by Y reason oic the V-shaped portion 68.

1 One cnd of the balance is provided with 'a weight 7l adjustably clamped to the arm by means of the bolt 72.y The other end of the balance is provided with a ychain 78 or similar device provided at its lower end with a 1 suitable connection 74 for .d-etachably engaging' the arm 9 of t-he center core section 7. It will be seen that when the core sections are to be removed, the balance arm can be drawn down and thechain'pconnection 74 attached to the handle 9 ot the coresection'7 and that the weight 71 will withdraw the core section as shown in Figure 4. The balance can then be swung out ot' the way andthe remaining core` sections can be readily removed and placed in the trays. It is to be understood, however, that the balance may be used on molds having any number of core sections, and that although seven such sections are shown, such showing is merely for the'zpurf pose of illustration..

In'order to adapt the moldto ready cleaning and repairing, I provide a pivotal connection between the racks 29 and cores 30. This connection comprises a ball joint 75 carried by the'core 30 and keyed thereto at 76. This ball rests in asocket 7 7 in the rack ein 29jand lis pivotally held, therein by means oi:V

a transverse pin 78 which extends through an opening 79 in theball, theopening 79V being of substantially llarger diameter than the pin to allow the ball to `reston the bottom of the socket'and thus'take-tliestrain from the pin, as clearlyfillustrated in Figure. 8. L

OpeningsSO are provided on each yside of the mold sections 2 and` 3 and are adapted to, receive the endsof removable handles 81 by which the mold sections ber-aised about the pivotpin 78 to be repaired or cleaned as shownfin detail in Figure 7 and' in dotted lines in Figure 4.' By this arrange- Y ment it is not necessary to remove the sections 2 and 3 from Vthe mold and consequently the sections do notbecome cold.'j

In order to'readily use molds of various sizes provide al detachable support for the mold. Thissupport comprises legsor other supporting means 82V bolted or otherwise rigidly secured to transverse angle ybars 83.

Longitudinal. angle bars 84 are rigidly secured to the transverse lbars 83 at their ends and coop-crate therewith to formarectangular frame. The upstanding sid-es 85 of the longitudinal angle bars 84 are provided with bolts 86 which extend therethrough.` Y

In operation, the mold base l is placed bef tween the barsv84 and the boltsjtightened until theyrmlvb'ear against` the base l as shown in Figure 6. It'will be seen that the mold ywill be held .securely 1in place, but may be readily removed and lreplaced by another mold. :l This construction obviates the necessity for asupportingbase, core rack Vand balance arm or'every mold, and its attendant inconveniences.

wienl i have Shows and described the preferred 'embodiment of. my invention, itis to vbe understood that various changes in the shape, size, and arrangement of parts may lil() be resorted Ato .without Vdeparting from ythe Y spirit of myinvention or the subjoined claims. i' `Having described my invention, what I scope of the 

